In the face of challenging circumstances, many teachers turn to spirituality for sustenance and strength. Yet spirituality's place in education and in educators' lives has long been a matter of confusion and contention, not least because of the ambiguity of the term in its common usage. What is its relationship to religion? And what defines it? In this article, I submit that the later work of Michel Foucault offers a helpful approach to spirituality that displaces those questions--drawing attention away from beliefs and/or attitudes professed, and towards the process of practical self-transformation that subjects undertake for the sake of a truth that is actualised in the body. To be spiritual in this sense is more a matter of what one does than what one believes or who one is. To offer a sense of why it matters in the lives of educators, I draw on the experiences of a San Diego high school teacher confronting interlocking personal, professional, and political challenges as a detailed example.